While free downloads for the Satlink WS-6933 exist, they are rarely found on an official manufacturer site. Your safest bet is to contact the seller you bought the unit from or look for files on reputable satellite enthusiast forums. If you are unsure about the file source, it is safer to manually update your transponder lists than to risk damaging your meter with incompatible firmware.
If you're unable to find the software update on the official Satlink website, you can try searching on other reputable sources, such as: satlink ws 6933 software update free download
If you cannot find a safe software link, You do not strictly need a firmware update to make the meter work on new satellites. The hardware is designed to be manually updated. While free downloads for the Satlink WS-6933 exist,
(Based on typical WS-6933 changelogs)
: Access up-to-date transponder data for accurate signal locking. If you're unable to find the software update
Do not trust random .rar files from unverified forums. Use these sources:
: Enhanced support for DVB-S and DVB-S2 signals. Where to Find Free Software Downloads